YouTube.com Receives an Infusion

SAN MATEO, Calif. -- Video-sharing Web site YouTube.com returned to its venture-capital investor Sequoia Capital and received an $8 million infusion.

Since its public launch in December, the company has amassed a collection of more than 35 million amateur and professional video clips that it provides free to visitors to its site. Sequoia Capital, of Menlo Park, Calif., perhaps best known for its early investments in Google Inc. and...